Nmap Network Exploration and Security Auditing Cookbook - Third Edition

Chapter 7: Scanning Mail Servers

Mail servers are available in almost any organization because email has taken over as the preferred communication channel. The importance of the role of mail servers depends on the information stored in them. Attackers often compromise an email account and proceed to take over all other accounts found in the mailbox, and recover other credentials using the forgotten password functionality available in almost every web application. Sometimes, compromised accounts are simply eavesdropped on for months without anyone noticing, and they may even be abused by spammers. Therefore, any good system administrator knows that it is essential to have a secure mail server.

In this chapter, I will go through different Nmap ...